I'm way late but just found this thread. I got sims 4 for christmas recently and I only have time to play on weekends but I started with the 100 baby challenge. I am on matriarch 2 and have a total of 18 children so far, a few times I had 3 toddlers at once and it is not usually that bad if you are good at micromanaging. If I get overwhelmed I just pause the game and go through each of my sims and tell them what to do. The dumb thing won't let me post links but I know where the actual rules are.
also, you should check out Kelsey Impicciche because she has been doing the challenge for buzzfeed for a while. She is on her second matriarch, had 60 something kids between the two. Super good at the game.
I would link her playlist, but, you know.
